Hand-stoker dump grate



Jan. 2, 1923. 1,440,939.

L. H. SIMMONS.

HAND STOKER DUMP GRATE.

FILED OCT. 4. 1920. 4 SHEETS-SHEET l- UUUUH U BM 1] USU HUM] HE E U 51H UUHUUHHHHUUUU EMU BU EMU UH Lee Jpgand Simnzmw,

Jan. 2,1923. V 1,440,939.

L. H. SIMMONS.

HAND STOKER DUMP GRATYE.

FILED OCT. 4. 1920. 4 SHEETS-SHEET a.

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LMOESQ. L. H.. SIMMONS.

HAND STOKER DUMP GRATE.

FILED OCT. 4, 1920. 4 SHEETS-SHEET 4.

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Patented Jan. i923.

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LEE I-IOEVARD SIMMONS, OF GOLDSBORO, NORTH CAROLINA, ASSIGNOE, BY MESNE ASEIG-NMENTS, TO THE SIMMONS IEANUFAO'IURING COMPANY, OF WILMINGTON, NORTH CAROLINA, A CORPORATION OF NORTH CAROLINA.

HAND-STOKES DUMP GRATE.

Application filed. October a, 1920. Serial No. 414,588. i

To all whom it may, concern:

Be it known that LEE HOWARD Simmons, a citizen of the United States, residing at Goldsboro, in the county of Wayne and State of North Carolina, has invented certain new and useful Improvements in Hand- Stoker Dump Grates, of which-the following is a specification.

My invention relates to a new and useful improvement in grates and more particularly to a hand stoker dump grate.

One of the numerous objects of my invention is to provide a grate which is formed of a plurality of sections so that the grate area 1 may be as large or small as desired for different sized furnaces.

Another object of my invention is to provide a grate that is easily rocked or shaken by hand so that a good lire bed may be kept on the grate at all times and with but little effort.

till another object of my invention is to provide a grate that is provided with a plurality of small quickly removable fire bars so that it is a relatively simple matter to replace any should they become damaged in use. btill another object of my invention is to provide means for rocking the fire bars to permit the ashes and burnt fuel to drop to the pit and also to provide means in con iunction with this rocking mechanism to break up the clinkers that arebound to accumulate in grates wherein soft coal is used for fuel.

E -till another object of my invention is to provide a clinker breaking means that will aca'zomplish the aforementioned object and ill ale force any re ini lower end of the fur lace onto a dump bar which may be lowered when a number of clii'ikers have accumulated theregm; I E lill another obj ct of my invention is t provide a hand shaking grate that is easy to assemble, relatively cheap to manufacture and very efiicient in operation.

Sitill another object of my invention is to provide a grate wherein the fire bars are held in a iOQliGd position when the rocker bar. mechanism is in its normal position and to so provide the clinker breaker mechanism clinkers to the i that it will tend to help bring the shaking mechanism back to its normal position after being operated.

As is well known to those skilled in the art large clinkers are bound to'form in fire beds which retard the efiiciency of the grate and which have to be removed, generally by means of an operator with a slosh bar. The present invention contemplates the breaking up of the clinkers while they are in the molten state and before becoming hardened, and also to force those clinkers which cannot be broken up in the molten state, to the rear of the grate from which they may be dumped into the ash pits. Furthermore, this is to be accomplished by simply operating the rocker bar mechanism on which are mounted the clinker breakers so that when the lire bars of the grate are shaken theclinkers are automatically forced to the rear of the furnace, the entire operation being accomplished with the furnace door closed so that the draft is in no way allected while the operation is being performed.

Vl ith these and numerous other objects in view which will be hereinafter more fully pointed out as the specification proceeds my invention consists in certain new and novel constructions and combinations of parts as will be hereinafter more fully described and pointed out in the claims.

. Referring now to the drawings. which sh ow the preferred form of my invention:

Fig; 1,is a top plan view of the complete assembly of my hand stoker dump grate. a part ofthe fire bars being broken away for the sake of clearness and a portion of two rocker bars being shown in dotted lines and clinker breakers in section and the rockerbar in elevation thereunder;

Fig-6 is a detail view of-afir'e-barr-and:a

portion of the rocker bar, theedotted-wlines showing the several positions of the fire bar when the rocker bar is operatedriand Fig. 7 is a detail view of the clinker breaker shown mounted onthe-roeker bar.-

Referring now for. the momentto Fig. 1 showing the assembled: grate arear wall 1 and'a front wall '2'areshown, the sidewalls being designated by the numerals-Wand" 1. This foundation, of course; will be of. the size required for the reception" of-theiproper sized grate which grate ,is' preferably made up of twoseries of grate bars and dump bars. In the presentembodiment I" have shown sinunits'of grate'bars; three intlie left hand series and three in theright hand series, and it will be understoodthatwhere larger grate areas are desirable further units of grate bars may be provided? 'As the. righthand series 5"consisting'of the three sets ofgrate bars and the dumping bar is in all respects similar to the left hand series (5 aadescription of butone serieswill be necessary.

Extending along the. rear .wall 1 is a channel section 7 anda'similarlyextending section 8 is embedded lin the masonry of the front wall; Resting inlthese two sections are the side supports'S and the center supports 10 on which supports rest the si'nallerrectangular grate frames 11 on' which aremounted the fire bars 12, which will be"hereinafter more fully described. T hesesupports 9 and 10 areprovided on their extreme ends with the lugs 131which rest within .the.. ,:hannel sections 7 and 8. the supports being offset asat l l. In definitely spaced relationai'e the bearings 15 for the reception of trunnions 16 whichare on the ends ofthe rocker bars 17 which bars will also berhereinafter described in detail, a

Gn thenpper surface of these side sup;- re 1053 t er eie iees which prevent the n s. 11 from. any longitudinal movement. At the lowerost e d. of ea i f heses emes areal-S0 shown the bearingslain.whichfis pivot-ed the; diunp bar 20 which is provided. fwithlthe arm 21. on its under surfacato which is connected tberod 22 by means of the elbow 23. The rod 22 is provided withturn bolts 24 so that. it "may be lengthened or shortened as -desired, so that.. when it is pulled up. wardly y he h dle 25 thez llsi fi will be On a plane with "thglowermost. edge ofithe fire bars.

Referring again to the grate frames-11 it will be seen that they consist simply of the front and rear walls 26 and 27 and one side wall 28, there being no side wall necessary on the inner side. For strengthening purposes, however, the curved brace 29 is shownextending from the front and rear walls and .-.on the undersurface of the frame which provides against any compression of these-wallsattheir innersides. These braces are clearly shown in Fig. 1.

A'S bBCfOJJG: mentioned in the present embodiment I have shown three of these frames inea-elr series of the grate, but the grate may be designed to include a greater number if it is to be used with a furnace calling for a larger grate area.

Hestingflon-th'ese frames ll'and extending fromthe' front tothere'anwall are placed the plurality offire-ba-rs 12, which are pro videdwitlr-tlielugs-30 ontheir inner sides so" that sufficient space *is provided between the bars for the passage of the'air.

These fire bars are somewhat similar to the fire bars shown in theipatent granted to me on Nov. 11, 1919, numbered1,321,252. A fire bar is shown in detail in Fig. 6- and it will be seenthat it comprises a relatively thin metalbar having'a flat upper surface provided atone end with the downwardly extending lug 31 and the further downwardly and'invardly extending arm and the arm the" two latter forming a cut outq aortion 34; which arcuate and in which open spaeeprojectsthe rocker arm 17. The ends ofthe bar extend beyond the lugs 81 and 33lso thatthey'may rest on the walls 26"'anfd'il27j ofthe' fra1nes11, and as will be noticedfrom Figs. Qand 3 the lugs 31 and 33 do not both contact with the opposite walls ofthe frame at the same time as these fire bars move slightly forwardly and rearwardly within the frame when the rocker bar x is operated.

Referring now. to the rocker bar 17 clearly shown iinFig. 5 it will .be noticed that it extends from a side support 9 to a center support 1.0; its trunnions 16 resting in the heretofore mentioned bearings 15. This rocker bar has the curved or semi-round upper surface as shown at 35 which is in the of.a headthat projects beyond the web-lfiiandis again enlarged 3? so that theiarin 32 may fit between the head and the enlarged portion 3'? of the rock bar. ltwill be noticed figures that there is provided a rocker bar frnfeaclnfranie and as there are three frames shown in each series there are also shown three of "these rocker bars. At the outer endof this rocker bar is. a downwardly exte11ding;arm38 and to allthree of the rocker bars is connected the bar 39 to which is adjustably fastened the bar e0 which is in turn piv tally cOnnecte'd at its outer end to the lever-'41 whichlever is mountedin the bear- "fire bars for :1.

ing R on the front of the furnace. An'adjustable connecting means, 43 is provided between the lever 41 and the rod 39 so that the lever il may be slightly adjustable.

When it is desired therefore to shake or rock all the fire bars in the series the movement of the handle 41 inwardly and 0utwardly will. cause all the rocker bars to move forwardly and rearwardly, and as clearly shown in Fig. 6 the upper surface of the rocker bar will contact with the under surface of the fire bars causing the same to move u 'iwardly and then downwardly at each end as the rocker bar is moved for- .vardly or rearwardly. The fire bars will also more slightly forwardly and rearwardly with the movement of the rocker bar. thus presenting a desirable shaking action to the fire bed. It will also be noticed that when the rocker bars are in the position as shown in Fig. 2 they will retain and look all of thefire bars in their desired position. Referring now to the clinker breakers which form a valuable part of the present invention it will be noticed from Fig. 7 that they each consist of an arm 44 in which is provided a cut-out portion 45 so that it may pass over the head 35 of the rocker arm 17 and fit tightly in its placed position. The arm 44 extends into the body portion 46 having the curved front edge and the downwardly projecting portion as. A plurality of openings 49 may be made in the clinker breaker to permit the passage of air therethrough from beneath the grate. A. plurality of these clinker breakers are provided on each of the rocker bars, and in Fig. I have shown six of these interspersed between the fire bars 12. By referring to Figs. 2 and 8 it will be seen that when the rocker bars 17 are in their normal'position these clinker breakersproject slightly below the surface of the fire bars and the cut-out portion 4-7 is slightly below' the surface of the fire bars to also permit the passage of air from beneath the grate to the fire'bed.

In Fig.8 clinker breakers are shownin their raised position, they projecting above the greater part of their length, thelower portion 48. however. always re maining beneath the surfaceof the fire bars otherwise itlwould be impossible to turn them to their normal position.

It will also be understood that a greater or lesser number of clinker breakers may be employed if desired. i i

From the foregoing it will be seen that when it is desired toshake the fire bars all that is necessary is a movement of the lever 41 which in turn through the rod 40 and bar 39 will simultaneously move .all three rocker bars which in turn will elevate the fire bars, first one end and then the other, in each frame and move the clinker breakers to the position shown in Fig. Thesechnker simultaneously a rat" 5f breakers will cut through the molten mass, breaking up in. most instances the clinkers and at the same time forcing the hard clinkers downwardly and eventually from the forwardmost part of the grate to the dumping grate 20. After the clinkers have been collected on this dump grate it is only necessary to move the handle inwardly which in turn will drop the clinkers to the ash pit where they may be removed;

Thus by simply moving the lever ll in wardly and outwardly not only will all of the fire bars be agitated in an upwardly and downwardly direction at their opposite ends but they will also be moved slightly forwardly and real-wardly thereby completely shaking the fire bed and at the same time the formation of the clinkers will be re vented while other clinkers will be forced downwardly at the dump plate where they may be conveniently dropped to the ash pit.

Although I have described but one series it will be seen that a movement of the other handle 41 will provide the same operation for the left hand series of the grate.

From the foregoing it will be seen that the entire grate is comparatively simple consisting of but few parts considering the function performed; one that is capable of being quickly and conveniently assembled and one wherein new fire bars and clinker breakers may be quickly and readily substituted when any of them become damaged by continuous use. Furthermore the operation is a manual one rather than employing expensive automatic shaking means.

The grate has proved highly efiicient in actual service, and it is to be understood that I do not wish to be limited to the precise form and detail shown in the drawings, as many changes may be made without in any way departing from the spirit and scope of the invention.

What I claim as new andv desire to secure by Letters Patent is 1. A grate comprising supporting members. a plurality of grate frames on said supporting members and arranged in two series. a plurality of spacedv movable fire bars on each of said frames and means or in each of said series a operating with each of said ind means for operating the same. and clinker breakers interspaced between said movable fire hart on each frame.

2. A grate comprising :mppcriing members, and a plurality of grate frames on said supporting members and arranged in a left and right hand series. movable fire bars resting on said frames and a rocker bar beneath and operably associated with said fire bars, means for operating simultaneously all the rocker bars in each of the series to thereby agitate the movable fire bars, and clinker breakers operably connected to said rocker bars.

3. A grate comprising supporting memhers and a plurality of grate frames on said supporting members and arranged in two series, a plurality of movable fire bars on said frames and a rocking bar positioned and operative in each of said frames,- an operating lever and means connected with said lever and said rocker bar in each series so that the rocker bar in each series may be operated simultaneously, the said fire bars on said frames being agitated by the operation of said rocker bars, and clinker breaking means on each of said rocker bars to break up the clinkers when said rocker bars are agitated.

a. A grate comprising supporting members, a plurality of frames resting on said supporting members and the frames arranged in two series, a dumping grate located at the rear of each series and means for operating the same, a rocker bar operative within said frames and the rocker bar in each series connected to an operating means, movable fire bars located on said frames and contacting with said rocker bars, clinker breakers interspersed between some of the movable fire bars on each frame and said clinker breakers and movable fire bars operated by the movement of the rocker bars.

5. A grate comprising supporting members, a plurality of frames located on said supporting members, a dumping-bar at the rear of said frames, means for operating the dumping bar, a rocker bar in each of said frames, aiplurality of spaced movable fire bars on each of said frames, a plurality of clinker breakers arranged on said rocker bars and interspersed between said fire bars, means for simultaneously operating all of said rocker bars to thereby agitate all of the fire bars in said. frames and to force said clinker breakers towards the dumping bar.

6. A grate comprising angularly positioned supports, a plurality of grate frames on said supports, a dumping bar located at the rear of said frames and means for opcrating the same, a plurality of movable fire bars resting on said frames, a rocker bar pivotally' mounted beneath each of said frames and means for simultaneously operating all of said rocker bars, said rocker bars contacting at a point in their travel with the fire bars to thereby agitate the same, and clinker breakers loosely mounted on each of said rocker bars and interspaced between said fire bars and operated by the movement of said rocker bars to'breakup the clinkers and force the same down on the dump bar.

7. A grate comprising supportingsmemserieson vsaid supporting, members, a plurality of movable firebars on each of said frames,= a rocker bar pivotally mounted beneath eachof said frames and operably associated: with saidfire bars, means for simultaneouslyoperating all the rocker bars in each series adumpingbar located at the rear of each of said series of frames and means for operating the same, clinker breakers-mounted; on said-rocker bars and normally lying below the surface of said fire barseand adapted to swing rearward when said roclrerba'rs are operated to thereby "break up --and-.force the clinkers onto the said dumping bars.

8. A grate comprising supporting members, anda plurality of grateframes on said supporting members, plurality of movable fire bars in spaced'relationwith each other on said} frame,-' -a rocker-bar ineachof-said frames and arranged toi -agitate thefire bars first at one end"- andthen the other, clinker breakers mounted on said rocker bars and normally lyinga below the surface of said fire-bars and adapted to be raised upwardly 0n themovement of saidrrocker bars, a portionof each clinker breaker remaining'below the-surface-ofsaicl fire bars when said clinker-breaker is'in' its rearwardmost position, and-means for operating: said rocker harsh,

' 9. A grate comprsing-ca plurality of grate frames iarrangeddntwo series and a dump bar-located; at the 'end of each series,'movable fire bars-locatedaontheyframes in each of said series means operably connectedtosaid fire barsfor agitatingfirst one end then the other of the same, andv clinker breakers mounted on-sai'd ineansto 'thereby force said clinkers onto-said dump: bar when said fire bars are "agitated;

1.0. A grate comprising a' plurality of dump bars, grate frames, a plurality of spaced movable fire bars 'on said frames, a rocker bar pivoted beneath each of said framesand operablyconnected with the fire bars on said'frames, means for simultaneously operating all the rocker bars of each series to thereby agitate all ofthe fire bars in said" series and said rocker bars locking the*fire bars in a set position when said. rocker j bars are in their normal position, clinker breakersarranged'alongQeach ofsa-id rocker, bars Sand adapted to be forced upwardly and" rearwardlys when saidf rocker bars are agitated to thereby force the clinkers onto said dump: bar, and means for op erating the dump bar.

11, A -grate comprising; a grate frame, a plurality of spaced movable fi-re 'bars'resting on said frame and aro'cker bar for agitating said fire bars, said'rocker bar havinganenlarged head thereon, a plurality of clinker breaker's having cut out 'p'ortion's correspondingg-with-i-the "head of the lrocker bar so that said clinker breakers are capable of a sliding fit, said clinker breakers adapted to rise when said fire bar is operated and said clinker breakers having downwardly extending portions always remaining below the level of said fire bars.

12. A grate comprising a frame and a plurality of spaced movable fire bars located thereon, each of said fire bars having a cut out 10 portion on its under surface and a rocker bar fitting within said out out portions and adapted to raise said fire bars off said frame from end to end when said rocker bar is operated, a plurality of clinker breakers on said rocker bar and adapted to raise above the plane of said fire bars when said rocker bar is operated, the forward edge of each clinker breaker being arcnate and a portion of the clinker breaker adapted to always remain below the surface of said fire bars.

In testimony whereof I aflir; my signature.

LEE HOWARD SIMMON 

